Whitney Houston visited a doctor not once but THREE TIMES in the days before she died drugged up in a Beverly Hills hotel room bathtub, Star magazine is exclusively reporting via RadarOnline.com.

Just as it was revealed the Los Angeles County coroner’s office had issued subpoenas for medical and pharmacy records from Houston’s doctors and medical providers, Star learned the troubled songbird saw a Beverly Hills doctor three times over the space of eight days: on Feb. 2, Feb. 7 and Feb. 10.

Los Angeles County assistant chief coroner Ed Winter said Wednesday that Houston’s medical records could shed additional light on why she died, at age 48 — and whether she had any serious medical conditions.

“We’ve already contacted a number of doctors with requests for records,” he said.

For more on Houston’s final days, pick up the latest issue of Star — on newsstands now.